There are 3 Aero Vodochody L-39C aircraft on the U.S. registry that TailWiki has a page for. Every one is built from the public FAA record — year, serial, engine, home base, and registration history — and owners and pilots add photos, trips, and stories on top. The ones listed here were built between 1975 and 1980.
N12GX
1980 Aero Vodochody L-39C
Palm Beach Gardens, FL
N139L
1975 Aero Vodochody L-39C
Alpine, WY
N656DT
Aero Vodochody L-39C
El Cajon, CA